Answer Posted / lakshman

Unix is Multi user O.S
Windows is Single User O.S
Unix is Open Source
Windows we have to buy the O.S
Unix Supports Multithreading Concept.
Windows does'nt.
Unix is hierarchical relationship . each process becomes
child of other process.
Windows has service processes

What does pipe () return?

590

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Name the various commands that are used for the user information in unix.

539

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What does the md command do?

568

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what is the advaantage of each user having its own copy of the shell?

2034

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How does the system know where one command ends and another begins?

1574

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How do I delete files from command prompt?

549

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Who wrote grep?

577

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When i run a programm of orphan process. Instead of getting child's parent (ppid)=1 ..i get 1400 and it varies as per system. How can i findthe right soluion??? My pgm: #include # include int main() { int pid; pid=fork(); if(pid < 0) {exit(-1);} else if(pid==0) { printf("Child Process is Sleeping ..."); sleep(10); printf("Orphan Child's Parent ID : %u ",getppid()); } else { printf("Parent Process Completed ... %u ",getpid()); exit(0); } return 0; } Output:

1758

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What do chown command do?

532

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What does 'mkdir' command do in UNIX?

658

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What are reported commands?

562

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Why is grep called grep?

773

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Write a command that will display files in the current directory, in a colored, long format.

679

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What is the pipe command?

574

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What does awk stand for?

603

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